Update test scripts to resolve CI error.

[ShotaAk]

What does this implement/fix?

CIのstep0.shで、クロスコンパイラのダウンロードと展開に失敗していたので修正します。

162000K .......... .......... .......... .......... .....     100%  258M=4.7s

2024-07-18 02:42:00 (33.7 MB/s) - ‘cross-gcc-8.3.0-pi_3+.tar.gz?viasf=1’ saved [165934944/165934944]

tar: cross-gcc-8.3.0-pi_3+.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now

https://github.com/rt-net/RaspberryPiMouse/actions/runs/9984649086/job/27594219533#step:3:3375

その他の変更

.test/ディレクトリに変更があればCIを実行するように書き換えます

Does this close any currently open issues?

いいえ

How has this been tested?

CIのチェックがパスすることを確認します。

Checklists

• I have read the CONTRIBUTING guidelines.
  • If there is no guideline in the repository, rt-net organization's guideline applies.
• I have checked to ensure there aren't other open Pull Requests for the same change.

[KuraZuzu]

LGTMです。